I would not recommand to do that. Overloading the regulator is not an issue, if will just get hotter and hotter, and the heatsink is even barely enough for the oric itself. There are anyway some internal protection into the 7905 so no risk of killing it.

What will be an issue is the power supply you use.

By the way, unless you use a really modern floppy drive that only use 5V or an HxC, you will need the 12V, so powering from the Oric is useless as you will have other problem, like the fact that the Oric ground is floating, so forcing this ground to another value if the Oric power supply is not properly isoltated, that may provoke some really good Magic Smoke effects.

Godzil wrote:I would not recommand to do that. Overloading the regulator is not an issue, if will just get hotter and hotter, and the heatsink is even barely enough for the oric itself. There are anyway some internal protection into the 7905 so no risk of killing it.

Yes, the 79xx and 78xx series have an internal thermal protection, the problem is the heat generated inside of Oric enclosure. NMOS 6502, 6522 and AY-3-8912 run very hot, if we add more heat to the system, we can experience strange issues (I have experienced this).

Godzil wrote:What will be an issue is the power supply you use.

If you use a low amperage PSU, you will burn it, if you use a PSU of 2 Amps, you have one ampere of surplus, because 78xx and 79xx series are rated at 1 Amp.

Godzil wrote:By the way, unless you use a really modern floppy drive that only use 5V or an HxC, you will need the 12V, so powering from the Oric is useless as you will have other problem, like the fact that the Oric ground is floating, so forcing this ground to another value if the Oric power supply is not properly isoltated, that may provoke some really good Magic Smoke effects.

So option 3 is clearly a No Go in most situations.

Yes, you need a second PSU to power ONLY the FDDs. So, you don't get any advantage with this configuration.

Normally, if you haven't other disk controller (original Microdisc or Cumana board), i send two disks as starting kit, one with Sedoric 3.0 and another one with very good game, but not very well known, Magnetix.

Silicebit. wrote:Normally, if you haven't other disk controller (original Microdisc or Cumana board), i send two disks as starting kit, one with Sedoric 3.0 and another one with very good game, but not very well known, Magnetix.

Very nice from you. Actually, this is not my first controller so I had disks already - so if you ever want me to send them back to you or directly to someone else that bought you a controller, just let me know

Symoon wrote:Very nice from you. Actually, this is not my first controller so I had disks already - so if you ever want me to send them back to you or directly to someone else that bought you a controller, just let me know

Don't worry Symoon, reuse it, or you can give it to another person who needs them.

@Vyper68. You have a private message waiting for you one month ago!! I'll wait for your response until end of july. If i don't receive a response from you, the controller will pass to the first person in the following list (Pluto63).